System for regulating the amperage and voltage of arc-lamp circuits.



A. n. STANDEFORD. SYSTEM FOR REGULATING THE AIVIPERAGE AND VOLTAGE 0F ARC LAMP CIRCUITS.

APPLICATION FILED AUG-19.19I4.

W, M 4 M A 1 m. 6 7 m w a 2 a and 16, respectively,

- UNITED STATES ARCHIE D. STANDEFORD,

PATENT onion.

3F KANSAS CITY, MISSOURI.

SYSTEM FOR REGULATING THE AMEERAGE AND VGLEEAGE 0L AEG-LAMP CIRCUITS.

To all whom it may concern:

Be it known that I, ARCHIE D; STANnE- FORD, a citizen of the United States, residing at Kansas City, in the county of Jacksonand State of Missouri, have invented certain new and usefulv Improvements in Systems for Regulating the Amperage and Voltage of Arc-Lamp Circuits, of which the following is a specification.

My invention relates to a system for regulating both the amperage and the voltage of electric circuits, and while it may be used to advantage for general purposes 18 especially adapted for use in moving picture are lamp circuits where a constant predetermined voltage is desired, to the end that a steady,brilliant light may be had at a minimum expenditure of carbon and current.

The invention embodies a new and useful arrangement whereby any may be quickly the desired voltage may be immediately restored at the arc lamp.

By the use of my invention the amperage at the arc lamp may also be increased or diminished at will, without altering the voltage at said arc-lamp.

In order that the invention may be r'ully understood, reference will now be made to the accompanying drawing showing a diagram of the invention, in which:

, 1, 2, 3 and 1 designate groups of coils progressively increasing in the number of coils in the order in which they are numbered. Each group is divided into sections 5, 6, 'Z and 8 by transverse conductors 9*, 10, 11 and 12 having switch points 13, 1 1, 15,

any of which are adapted to be engaged one at a time by a switch 17, communicating with a line wire 18, leading to the arc lamp 20, and communicating with a source of electrical energy such as a dynamo 21.

19 designates a conductor communicating with one end of the groups 1 to 4, inclusive, and a wire 19 leading to the lamp 20. The transverse conductors 9 to 12, inclusive, of each group of coils are separated by air gaps 22, adapted to be closed by switches 23, each having a plurality of contacts 24: to simultaneously close the air gaps between fluctuations in the line voltage controlled, to the end that the two adjacent sets of transverse conductors.

Assuming that the desired voltage is be- Specificationof Letters Eatent.

' ing delivered to the of resistance coils and switches,

Patented May 23, 1916.

1914. Serial No. 857,498.

lamp 20 when the switch 17 is in communication with the point 14,

and such voltage should for any cause diminish and produce an unsteady light, the desired voltage at the lamp may be readily restored by throwing the switch 17 into contact with either ofthe points 15, 16, to cut out the proper number of coil sections. Should the voltage rise above normal the switch 17 isthrown into contact with the point 13 to cut in additional resistance to restore the voltage to normal at the lamp 20. The amperage may be increased or diminished at will, so that the brilliancy of the light at the lamp 20 may be increased or diminished without changing the voltage by closing or opening one or more switches 28. This renders the system especially adaptable for are lamps employed in the projectionof moving pictures where it is desirable at times to change the brilliancy of the light to accommodate light and dark pictures.

From the foregoing description it will be understood that the voltage at the lamp 20 is regulated as desired by cutting in or out the proper amount of resistance through the adjustment of the switch 17, while the amperage at said lamp 20 is regulated through the intermediacy of the switches 23. While I have shown the resistance coils arranged in groups of switches 23 to a minimum, it is to be to reduce the number provided with an individual switch when desired.

Having thus described I claim and desire to Patent, is:

1. A system of the character described, consisting of a plurality of resistance coils, spaced transverse conductors dividing said coils into sections, a circuit communicating with said coils, switch points communicating with the transverse conductors, a switch communicating with the circuit and adapted to engage any of the switch points to regulate the voltage of the circuit, and a switch having a plurality of contacts to engage the transverse conductors to regulate the amperage of the circuit.

2. A. system of the character described, consisting of a plurality of resistance coils arranged in groups, spaced transverse conductors dividing said groups into sections, a circuit communicating with said coils,

my invention, what secure by Letters switch points communicating with the transverse conductors of one group of coils, a switch communicating with the circuit and adapted to contact any of the switch points to regulate the voltage of the circuit, and switcheshaving a plurality of contacts to engage the transverse conductors to regulate the amperage of the circuit.

3.v A system of the character described, consisting of a circuit, a plurality of resistance coils communicating at one end with a said circuit, transverse conductors dividing said resistance coils into sections, switch points communicating with one end of a number of said conductors, a switch communicating with the circuit and adapted to contact any of said switch points, and a plurality of switches having contacts to enductors being spaced, a switch engageable with the conductors of one of the coils, and a switch having half as many contacts as there are conductors in any two adjacent coils to engage the adjacent ends of said conductors of said two adjacent coils.

In testimony whereof I afiix my signature, in the presence of two witnesses.

ARCHIE D. STANDEFORD. Witnesses:

F. G. FIsoHER, L. J. FIsoHER.

copies of this patent may be obtained for five cents each, by add'rening the "Commissioner or Patent:

7 Washington, I). 0. 

